Jeeps with the NP231 transfer case have one big weak point: slip yokes are used on the rear output shaft of the transfer case rather than a fixed yoke and a driveshaft with slip splines. This type of design is okay for street driving, but once you lift your Jeep and install bigger tires, the stress on the slip yoke or rear output shaft can be too much. Thankfully, CJ Pony Parts carries this Rough Country (50-7907) NP231 Transfer Case Slip Yoke Eliminator Kit that comes with everything you need to modify your transfer case!
Features & Benefits:
- Converts Transfer Case from Slip Yoke to Fixed Yoke for Improved Off-Road Durability and Performance
- Includes Everything Needed to Modify Transfer Case
- Fits 1988-1995 Wrangler YJ
- Fits 1997-2006 Wrangler TJ
- Fits 2004-2006 Wrangler TJ Unlimited
- 3/8"-32 Spline Rear Output Shaft
- 356-T6 Heat-Treated Aluminum Alloy Tail Housing
- 1310 CV Yoke
This Rough Country (50-7907) NP231 Transfer Case Slip Yoke Eliminator Kit is just what you need to convert your Jeep’s transfer case from a slip yoke to a fixed yoke for better off-road durability and performance. It has a 3/8"-32 spline rear output shaft and a 356-T6 heat-treated aluminum alloy tail housing.
*Does not fit Rubicon models.
*For use with NP231 model transfer cases ONLY.
*This kit requires an extended travel drive shaft, which helps to prevent driveline vibration and the rear output shaft from breaking.
Please Note: This kit was designed with the most current design shaft found in the New Process Gear NP231. This current design shaft was introduced in 1997. Jeep vehicles using the early NP231 can still use our kit, providing that the needle bearings are removed from the stock drive sprockets.